The SAKR Factory for
Developed Industries produces two types of 122mm surface-to-surface rockets:
the SAKR-18 and SAKR-36, containing 72 and 98 M42D submunitions, respectively.

So this brings us to the items shown later on in the video

The image quality isn't great, but you get a sense of what they look they, a small munition with what's known as a "drag ribbon" attached, which unfurls when the bomblet is deployed and acts to stablise and arm the bomblet. One problem with this is it also results in the bomblet getting caught up in trees and bushes, presenting an UXO hazard. Unfortunately I've been unable to find a reference image for a M42D bomblet, but here's a couple of example of other very similar bomblets via the Cluster Munition Coalition

You'll note the US made M42 submunition looks very similar, which, based off the designation, makes me wonder if the M42D is a copy of that munition.

In lieu of a reference image for the M42D I cannot say for certain
that the submunitions in the video are M42Ds, but based off the type of
rocket pictured in the video it seems highly likely we have the first
evidence pointing towards a new type of cluster munition being used in
Syria by the Syrian army.

Update December 16th Thanks to Mark Hiznay for pointing me to this reference image of a M42D cluster bomblet, which appears to match the submunition shown in the video

Update January 3rd 2013 This new video has been posted showing a much clearer shot of the submunitions, which appears to match with the above pictured M42D

Update January 7th Thanks to Nic Jenzen-Jones of the Rogue Adventurer blog for providing me with this video of a sales video for these rockets, with good cutaway models showing how the bomblets are held inside the rocket